Guardian Filtration - Hot Tub & Spa Filter Replacement for Pleatco PWK65, Unicel C-8465, Filbur FC-3960 | 65 Sq. Ft. of Premium Filter Cartridge Material | Model 810-235… Description Features: Filters May Be Green or Blue REPLACEMENT FILTER - Get purer, cleaner water in your pool or spa with these replacement cartridge filters compatible replacement for Pleatco PWK65, Unicel C-8465, Filbur FC-3960. See below for alternate filter names. Filters May Be Green or Blue DIMENSIONS - This replacement pool filter cartridge has the following measurements: Diameter: 8 1/2" Length: 10 1/2" Top Hole: 3" Bottom Hole: 3" MULTI PACK SAVINGS - Choose from our value savings single, double or 4 pack filter bundle. Having multiple filters on hand can help extend the life of each and protects your pool or spa because you can keep 1 filter active while cleaning the other for zero filtration downtime. EASY TO CLEAN - Guardian Filtration Products are designed to be long lasting and easy to clean so you can keep your pool and spa crystal clear and safe for you and your family. Our premium filter material keeps your water clearer and is easier to clean. Guardian Filtration Products has been operating out of Northwest Pennsylvania since 2003. We're committed to creating affordable, high quality pool filtration products and accessories...Click Add-to-Cart or 1-Click Buy to order your pool/spa filter cartridge today! Product Details: Product Dimensions: 11 x 9 x 9 inches Item Weight: 2.5 pounds Manufacturer: Guardian Filtration Products Item model number: 810-235-01 Is Discontinued By Manufacturer: No